(19)
(11) EP 0 333 391 A3

(12) EUROPEAN PATENT APPLICATION

(88) Date of publication A3:
17.01.1990 Bulletin 1990/03

(43) Date of publication A2:
20.09.1989 Bulletin 1989/38

(21) Application number: 89302398.6

(22) Date of filing: 10.03.1989
(51) International Patent Classification (IPC)4F04C 2/344
(84) Designated Contracting States:
AT BE CH DE ES FR GB GR IT LI LU NL SE

(30) Priority: 16.03.1988 DK 1441/88
25.11.1988 DK 6574/88

(71) Applicant: J. S. MASKINFABRIK A/S
DK-9881 Bindslev (DK)

(72) Inventor:
  • Sorensen, Freddy
    DK-9881 Bindslev (DK)

(74) Representative: Olsen, Peter Vestergaard (DK) et al
Allerupvej 23
DK-9220 Aalborg OE
DK-9220 Aalborg OE (DK)


(56) References cited: : 
   
       


    (54) Vane pump


    (57) A vane pump for working at relatively low rotary speed (even < 70 rpm), which pump comprises a pump housing 3 (with inlet 5 and outlet 7 ports), a rotatable seated pump wheel 15 fitted in said housing with its axis 51 of rotation eccentrically placed in relation to the interior of the pump housing, said pump wheel being fitted with two vanes 37 seated such as to be radially slidable in relation to the pump wheel and being movable between two extreme positions dependent on the shape and internal siting within the pump housing of parts 57 intended for guiding radially facing edges 45 of the vanes, wherein each vane stretches diametrically through the pump wheel and is substantially at right angles to the other vane, the parts guiding the vane edges are shaped to define circular arc-sections of travel for the vane edges centred in the rotation axis of the wheel in at least one section between the inlet port and the outlet port, said section covering an angle of at least 90° as viewed parallel to the rotation axis.





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